Accelerator means what ? Retarder means what ? Why gypsum is used in cement ?
A fire brick, firebrick, or refractory is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency. There are mainlyRead more
A fire brick, firebrick, or refractory is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency.
There are mainly three varieties of refractory bricks;
a) Acid Refractories
i. Ordinary Fire Bricks
ii. Silica Bricks
iii. Ganister Bricks
b) Basic Refractories
i. Magnesite Bricks
ii. Dolomite Bricks
iii. Bauxite Bricks
c) Neutral Refractories
i. Chromite Bricks
ii. Carborundum
iii. Chrome Magnesite Bricks
iv. Spinal Bricks
v. Forsterite Bricks
Komal Bhandakkar
Gypsum: It acts as a retarding agent in cement, which prevents the flash setting of cement. It has another advantage that it is fire resistant also. It also influences the strength, strength development, and volume stability of cement. It simply means that the addition of gypsum in cement not only iRead more
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